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Service Manual
AX-100 (Black)

TOWA Business

Precision

Electronics 2007-07

(Zhong Shan)

CO.,

LTD.

Table of contents

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Product Specification ......................................................................................................................................... 2 1£® GeneralSpecification................................................................................................................................... 2 2£® Function Specification ................................................................................................................................. 3 ¢ò£® Initialization....................................................................................................................................................... 6 1£® Control lock and its function ....................................................................................................................... 6 2£® System clear ................................................................................................................................................. 6 3£® System reset................................................................................................................................................. 6 ¢ó£® Module connection diagram .............................................................................................................................. 7 ¢ô£® Circuit instruction.............................................................................................................................................. 7 1£® Power supply circuit .................................................................................................................................... 7 2£® Reset and power failure circuit .................................................................................................................... 9 3£® Front display control and keyboard scan circuit........................................................................................ 10 4£® Rear display control circuit ........................................................................................................................ 12 5£® Print circuit ................................................................................................................................................12 6£® Communication circuit .............................................................................................................................. 13 7£® CPU£¨ IC1£© Resource allocation .............................................................................................................. 14 8£®RAM£¨ IC3£©.......................................................................................................................................... 16 ¢õ£® Classify by common malfunctions and dispose of method.............................................................................. 17 £¨ Entire machine exceptionally................................................................................................................. 17 1£© £¨ Data exceptionally................................................................................................................................. 18 2£© ¢ö¡¢ PCB layout diagram£¨ layer£© Top .................................................................................................................. 19 ¢÷¡¢ of entire machine...................................................................................................................................... 20 List

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Product Specification

1¡D General Specification 1¡¢ Front display 8 digits, 8-segments LED(Including decimal point) Your cash register has one 8-segments displays for the operator. It displays prices, subtotals, change due, status codes and so on. This display can show up to eight digits. 2¡¢ Rear display: as same as the front display 3¡¢...